Sewing machine



June 1o, 1930. A. B. CLAYTQN 1,762,812

y SEWING mn-INE mea Jan. 2s. i925 s sheets-sheet 1 WITNESKS June l0, 1930. A. B. CLAYTON SEWING MACHINE Filed Jan. Y28. 1928 3 sheets-sheet 2 lNvENTOR ATTORN EY June 10, 1930. A. B. CLAYTON 1,762,812

l SEWING MACHINE l Filed Jan. 28, 1228 5 Sheets-Sheet. 3

INVENTOR Wgr-:25 2v I. iwi/wg v ATTORNEY l Patented .lune 110, 1930 lU1sestares vv'ATENf'r OFFICE j ANDREW B; CLAYTON, or' UN'IoYNgNfEW JERSEY, nssrcfNoR ro THE srNCRl MAN- FACTURING COMPANY, OFNELIZABETYH, yNRW JERSEY, 'n .CORPORATION 0F' NEW JERSEY SEWING MACi-II'NE Appiicaao'n mearanary 2s, 1592s. serial No. 250,111.

This invention relates to sewing machines of the cylinder-bed chain-stitch type and has for anobject to provide a sewing Vmachine with simplified and compact feeding, loopere actuating Y and Y looper-thready Controlling lmechanism particularly adapted to beh'oused u the-restricted space within the cylinder- The machine is provided with a main=shaft w extendingtransversely ofthe sewing machine standard-,rin line with 'and extending into the cylinder-bed and preferably terminating at a bearing-lug disposed about midway the length of such bed. The direction of feed is l5 across the vcylinder and the feed-dog is carried by an inverted U-shaped yoke, the legsiof which are pivotally y'carried by crank-arms `xed to 'a Yfeed-lift rock-shaft extending the full length ofthe cylin'deran'd actuated by a'- 20 link# and eccentric-connection with the main- `shaft. The '-feed-and-return 'motion ofthe n feed-dog is derived from a .short rock-"shaft jo'urnaled in the bearing-lug which 'supports the front endV of the main-shaft. 'llhisrock- 25. shaft carries -a slotted arm which extends horizontally rearwardly' across' the cylinder. A bell-crank lever loosely journaled on the feed-lift rock-shaft has a horizontalslotted arm extending forwardly across the cylinder,

" 3@ close tothe first mentioned slottedarm. A

connecting-pin is Vadjustably mounted in the slotted bell-cranklever' arm and extends into the other slotted arm. The bell-cranklever has an upstanding slotted arm whi'ch'receives a pin on Vthe feeddog carryingyoke "to rock the latter and thus give vthe feed-dog its feed-and-return components of motion;l

The looper-mechanism comprises afsliding and rocking'looper-'shaft extending length'- wise vof the cylinder below the 'main-shaft. Rockingmovements of the ldoper-shjaftare derived from a long eccentric on the mainshaft, which eccentric isslifdably embraced by a forked arm Xed to the loope'rs'haft'. Slid- 45 ingjmovement of the loop'er-shaft is derived from a bell-crank and link connection'wit'h Athe needle-bar operating rock-shaft, which, in turn, is actuated by acra'nkandpitman connection with *themalin-shaft..

The looper-'thread controlling-mechanism thread controlling-lever with th-e threadcarrying' arms thereof removed.

-ati-ngf-roc'kshaft 14,'"which, at its forward end, .has the yusual'crank .1 5 'and 'link-conneclcomprises av crank-and-linkftake-up device disposed within and preferably crosswise of the cyl-inder,jat the end ofthe main-shaft,

and between the latter andthetwo'slcttedarms of the vfeedafnd-return actuating mecha'- nism. The anchor-linkvfo'f 'the take-,up is loosely carried by the feed-l-ift rock-shaft.-

'Y The invention will be better understood by referring to the accompanying. drawings, v,in which Fig. l is a side' view,in section, of the entire sewing machine. Fig.. 2 is a horizontal section through the cylinder-bed and ,sta-nd-V ard. Fig isa section on the line 3-`3, Fig. 2. Y Fig.- 4f is a disassembled perspective View ofthe feed-dog carrying-yokefand its actuating bellfcr'ank lever. yFig. 5' is va perspective View of the looper-thread controller actuating-crank. Fig. 6 i'sa section on the line 6*-6,-Fig..1. Fig. 7 -is an end view of the mechanism within the cylinder-bed. Figs. 8, 9 'and 10 are, respectivelysectionalviews on the lines 8 8, 9-9 and 1KG-'10, jFi-g. 2', ,and Fig. llis a perspective viewvof the 'looper- 7,5 In the preferred embodimer-it` of the inventlon illustrated, 1 represents Vthe standardof the" sewing "machine and- 2 .the overhanginfg bracket-arm which-terminates in the head 3.

Projecting horizontally' from thestandard l,

'below the arm 2,- is the cylinder-bed 4. Journaled inbearings 5,6' and 7 isthemainlshaft r8,W`hich extendswithin and lengthwise of the cylinder-bed t, and terminates at the point 9, Fig. 2, about mid-way the length of the .85

cylinder-bed. The main-shaft 8 is formed with the crank l0 which isA connected by the ^vpitrna'n 11 vto the ball 12 on one arm 13 of a double crank fixed to vthe needle-baroper- O tion v16 withV the reciprocating` needle-bar 17 'carrying the. eye-pointed needles 18e. The -press'er-foot'lt) is carried,A as usual," bythe 'downwardlyspringfpressed presser-'bar 20w i Cooperating. with the presser-foot 19 to feed thezwork across the cylinder I `isthe four-rnotion feed-dog 21 whichE is' mounted on the'inverted U-shaped feed-bar 22 having atv the ends of its downwardly extending legs 1530 23 the alined bearing-pins 24 which are sustained by the feed-lifting arms 25 xed to the feed-lift rock-shaft 26. The feed-lift rockshaft 26 extends the full length of the cylinder-bed 4 and into the standard lrwhere it has fixed thereto, Fig. 6, a crank-arm 27 pivotallykv connected at 28 to the eccentricstrap member 29 embracing the feed-lift eccentric30 on the main-shaft 8.

vzo

4justably secured to the horizontally slotted arm 40, the split hub 41 of which is clamped 1 to the sleeved bearing-hub 42 of a rocker-arm 43V formed in its side face with a slot 44. The slot 44 receives the block 45 on the pin 46 which is fixed to the feed-bar 22. The hub 42 of the arm 43is free to turn upon and relative to the rock-shaft 26, and the arms y i 4()l and 43 which are clamped together by the split-hub41, constitute a bell-crank lever for transmitting the up-'and-down motion of the pin 39 to the pin 46 to which is impartedv a 'feed-and-return motion.

The loopers 47, which cooperate with the needles 18, are secured tothe looper-carrier 48 which is fixed to the forward end of the rocking and sliding looper-shaft 49 journaled inthe cylinder-bedr below the main-shaft 8. Thev sliding movement of the looper-shaft 49 which imparts the loop-seizing and -shedding movements to the loopers, is derived through a train of connections with the arm 50 of the double-armed lever 13,V 50 fixed to the needle-bar operating rock-shaft 14. The arm 50 carries a ball. 51 to which is connected the upper end of a link 52 connected at its lower end to the ball 53 on the horizontal arm 54 of a bell-crank lever 54, 55 fulcrumed on the shaft 56 iii-the standard 1. The bellcrank lever arm is forked at its Vupper end to embrace the split-block 57 which, in turn, embraces the ball-ended arm 58 fixed to the looper-shaft 49.

The needle-avoiding movements Vof the loopers are produced by a rocking motion of the looper-shaft 49 which is derived from the eccentric 59 in the main-shaft 8. The

eccentric 59isembraced by the split-block 60 the flat sides of Awhich are embraced by the forked Vupper end of the arm 61, fixed to the looper-shaft`49. The split-block 60 is long` enough toaccommodate the movements of the i `arm 61 with the shaft 49 lengthwise of the cylinder-bed.

within and crosswise of the cylinder-bed at the end of the main-shaft 8. Fixed to the main-shaft is the circular head 62 carrying the crank-pin 63 which is embraced by one end of the lever-arm 64 fulcrumed at 65 to one end of the anchor-link 66 journaled freely on the rock-shaft 26. The lever 64 is provided with spaced sockets 64 in which are fitted the thread-arms 67 having in their free ends the thread-eyes 68. Between the arms '67 is mounted on the bearing-lug 5 the fixed threadguide 69. Y Atthe rear of the rearwardly disposed take-up arm 67 is mounted a second fixed thread-guide 70. When the .loopers are fully advanced, the movable thread-eyes 68 are in substantial alinement with the threadeyes in the fixed gui-des 69 and 70. As the loopers retract, the movement of the threadeyes 68, toward their dotted line position, Fig. 10, takes up the slack looper-thread. The return movement of the thread-eyes 68 to their full line position, Fig. 10, gives up thread to the loopers in their movement to the end of their advancing stroke.

The split hub 41 may be loosened tof permit the lever 43 and its sleeved hub to be rocked relative thereto to adjust the feed-dog to a central working position in the feed-slots 71 of the throat-plate 72.

Having thus set forth the nature of the invent-ion, whatl claim herein is :-V

1. Feeding mechanism for sewing machines comprising. a cylinder-bed, an inverted U- vshaped feed-bar,.feed-lift and feed-advance rock-shafts, spaced arms on the feed-lift rockshaft pivotally connected to the ends of the legs of said feed-bar, a lever fulcrumed coaxially with said feed-lift rock-shaft, a feedadvance connectionbetween said lever and said feed-bar, and a feed adjusting connection 1 between said feed-advance rock-shaft and said lever. f i

2; In a sewing machine,.a cylinder-bed, a feed-dog, a feed-bar, feed-lift mechanism connected to said feed-bar, a feed-advance rock-'shaft journaled Vin and lengthwise of said cylinder-bed at one side of the latter, a slotted arm carried by said feed-advance rock-shaft and extending crosswise of said "cylinder-bed, a bell-crank lever fulcrumed at the other side of said cylinder-hed and having one of:l its arms slotted and extending toward the feed-advance rock-shaft alongside the first mentioned slotted arm, an operative connection between the other arm of the bell-crank lever and the feed-bar, and a feedadjusting pin adjustably secured.. to one of said slotted arms and extending into the slot in the other slotted arm.

3. In a sewing machine, a cylinder-bed, i feed-advance and feed-liftv rock-shafts journaled in said bed, a slotted arm on said feedadvance rock-shaftV extending toward said feed-lift rock-shaft, a: lever fulcrumed coaxially with said feed-lift rock-shaft and having one of its arms slotted and extending toward the feed-advance rock-shaft alongside said irst mentioned slotted arm, a feed-dog, a feed-bar carrying said feed-dog, one or more feed-bar carrying arms on said feed-` lit rock-shaft, a feed-advance actuating connection between said lever and said kfeed-bar, and a feed-adjusting pin adjustably secured to one of said slotted arms and extending into theslot in the other slotted arm.

4. A sewing machine having, in combination, a frame including a standard, a bracket-arm and a cylinder-bed, a'main-shaft journaled in said frame in line with and extending into said 'cylinder-bed, a throat-plate formed with feed-dog slots, a feed-dog, an inverted U-shaped feed-bar, a feed-lift rockshaft, spaced crank-arms on said rock-shaft pivotally connected to thelower ends of the legs of said feed-bar, a bell-crank lever fulcrumed on said feed-lift rock-shaftaone arm of said bell-crank lever` being connected to said feed-bar and the other arm extending across the cylinder-bed, ya feed-advancing rock-shaft having a crank-arm extending alongside said other arm of the bell-crankl lever, and an adjustable pin-and-slot connection between said last mentioned arms.A

5. A sewing machine having a frame including a standard, a bracket-arm and a cylrock-shaft having a crank-arm extending alongside said other arm of the bell-crank lever and means for relatively adjusting the arms of said bell-crank lever angularly to center the feed-dog in the feed-dog slots in the throat-plate. Y

7. Feeding mechanism for sewing machines comprising, feed-lift and feed-advance rock-shafts, va feed-lifting arm fixed to said feed-lift rock-shaft, a feed-dog, a feed-bar Acarrying said feed-dog and including an arm rigid with said feed-bar and extending downwardly to and pivotally connected with said feed-lifting arm, a lever fulcrumed coaxially with said feed-lift rock-shaft and connected to impart feed-and-return-motions to said feed-bar, and means connected to saidfeedadvance rock-shaft' for vibrating said lever. ,A In testimony whereof, I have signed my name to this specification. i

/ ANDREW B.

CLAYTON.

inder-bed, a main-shaft journaled in line with and extendinginto said cylinder-bed, a reciprocating needle, a looper, a rocking and sliding looper-supporting shaft kjournaled in and lengthwiseof said cylinder-,bed below said main-shaft, a four-motion feed-dog,

:feed-advance and feed-lift rock-shafts journaled within and lengthwise of said cylinderbed at opposite sides of said main-shaft, operative connections between the main-shaft and looper-supporting-shaft for rocking and sliding the latter, the said means for rocking the looper-shaft including an eccentric carried by the main-shaft within the cylinderbed and an arm connected to the looper-shaft rand embracing said eccentric, and operative connections `between the main-shaft and said feed-advance and feed-lift rock-shafts, said last mentioned connections'including a pair of eccentrics on the main-shaft at opposite ends of said looper-shaft rocking eccentric.

6. A sewing machine having, in combination a frame includingra standard, a bracketarm and a cylinder-bed, a main-shaft journaled in said frame in line with and extending into said cylinder-bed, a throat-plate formed with feed-dog slots, a feed-dog, an inverted U-shaped feed-bar, a feed-lift rockshaft, spaced crank-arms on said rock-shaft pivotally connected to the lower ends of the legs of said feed-bar, a bell-crank lever ful- Y crumed on said feed-lift rock-shaft, one arm of said bell-crank lever being connected to said feed-bar and the other arm extending across the cylinder-bed, a feed-advancing `iisy 

